2500000001 has 2 divisors, whose sum is σ = 2500000002. Its totient is φ = 2500000000.

The previous prime is 2499999977. The next prime is 2500000033. The reversal of 2500000001 is 1000000052.

It is a Cunningham number, because it is equal to 50000²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2500000000 + 1 = 50000^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2500000001 is a prime.

It is not a weakly prime, because it can be changed into another prime (2500006001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250000000 + 1250000001.

It is an arithmetic number, because the mean of its divisors is an integer number (1250000001).

Almost surely, 2^2500000001 is an apocalyptic number.

It is an amenable number.

2500000001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2500000001 is an equidigital number, since it uses as much as digits as its factorization.

2500000001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 2500000001 is about 50000.0000100000. Note that the first 4 decimals coincide. The cubic root of 2500000001 is about 1357.2088084784.

Adding to 2500000001 its reverse (1000000052), we get a palindrome (3500000053).

The spelling of 2500000001 in words is "two billion, five hundred million, one", and thus it is an aban number.